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Date:   Sun, 14 May 2023 18:48:50 -0300
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Subject: Re: [patch V4 00/37] cpu/hotplug, x86: Reworked parallel CPU bringup
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To:     Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>
Cc:     x86@kernel.org, David Woodhouse <dwmw2@infradead.org>,
        Andrew Cooper <andrew.cooper3@citrix.com>,
        Brian Gerst <brgerst@gmail.com>,
        Arjan van de Veen <arjan@linux.intel.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Paul McKenney <paulmck@kernel.org>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        Sean Christopherson <seanjc@google.com>,
        Oleksandr Natalenko <oleksandr@natalenko.name>,
        Paul Menzel <pmenzel@molgen.mpg.de>,
        Piotr Gorski <lucjan.lucjanov@gmail.com>,
        Usama Arif <usama.arif@bytedance.com>,
        Juergen Gross <jgross@suse.com>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        xen-devel@lists.xenproject.org,
        Russell King <linux@armlinux.org.uk>,
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        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>, Guo Ren <guoren@kernel.org>,
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        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        linux-mips@vger.kernel.org,
        "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
        Helge Deller <deller@gmx.de>, linux-parisc@vger.kernel.org,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        linux-riscv@lists.infradead.org,
        Mark Rutland <mark.rutland@arm.com>,
        Sabin Rapan <sabrapan@amazon.com>,
        "Michael Kelley (LINUX)" <mikelley@microsoft.com>,
        Ross Philipson <ross.philipson@oracle.com>
References: <20230512203426.452963764@linutronix.de>
From:   "Guilherme G. Piccoli" <gpiccoli@igalia.com>
In-Reply-To: <20230512203426.452963764@linutronix.de>
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On 12/05/2023 18:06, Thomas Gleixner wrote:
> Hi!
> 
> This is version 4 of the reworked parallel bringup series. Version 3 can be
> found here:
> 
>    https://lore.kernel.org/lkml/20230508181633.089804905@linutronix.de


Hi Thomas, thanks for series! I was able to test it on the Steam Deck
(on top of 6.4-rc2), and everything is working fine; also tested S3
suspend/resume, working as expected.

Some logs from boot time:


Parallel boot
[    0.239764] smp: Bringing up secondary CPUs ...
[...]
[    0.253130] smp: Brought up 1 node, 8 CPUs


Regular boot (with cpuhp.parallel=0)
[    0.240093] smp: Bringing up secondary CPUs ...
[...]
[    0.253475] smp: Brought up 1 node, 8 CPUs


Feel free to add (to the series):

Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com> # Steam Deck

Cheers,


Guilherme